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                                 UNITED STATES
                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C. 20549

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                                   FORM N-PX

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                    ANNUAL REPORT OF PROXY VOTING RECORD OF
                  REGISTERED MANAGEMENT INVESTMENT COMPANIES

                 Investment Company Act file number 811-21780

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                             MFS SERIES TRUST XII
              (Exact name of registrant as specified in charter)

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              111 Huntington Avenue, Boston, Massachusetts 02199
              (Address of principal executive offices) (Zip code)

                               -----------------

                             Christopher R. Bohane
                   Massachusetts Financial Services Company
                             111 Huntington Avenue
                          Boston, Massachusetts 02199
                   (Name and address of agents for service)

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      Registrant's telephone number, including area code: (617) 954-5000

               Date of fiscal year end: April 30 and October 31*

            Date of reporting period: July 1, 2018 - June 30, 2019

* The MFS Equity Opportunities Fund has a fiscal year end of October 31. The
  fiscal year ends of the remaining series of the Registrant are April 30.

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ITEM 1. PROXY VOTING RECORD.



******************************* FORM N-Px REPORT *******************************

ICA File Number: 811-21780
Reporting Period: 07/01/2018 - 06/30/2019
MFS Series Trust XII









======================== MFS Equity Opportunities Fund =========================


ADOBE INC.

Ticker:       ADBE           Security ID:  00724F101
Meeting Date: APR 11, 2019   Meeting Type: Annual
Record Date:  FEB 13, 2019

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1a    Elect Director Amy L. Banse             For       For          Management
1b    Elect Director Frank A. Calderoni       For       Against      Management
1c    Elect Director James E. Daley           For       For          Management
1d    Elect Director Laura B. Desmond         For       For          Management
1e    Elect Director Charles M. Geschke       For       For          Management
1f    Elect Director Shantanu Narayen         For       For          Management
1g    Elect Director Kathleen Oberg           For       For          Management
1h    Elect Director Dheeraj Pandey           For       For          Management
1i    Elect Director David A. Ricks           For       For          Management
1j    Elect Director Daniel L. Rosensweig     For       For          Management
1k    Elect Director John E. Warnock          For       For          Management
2     Approve Omnibus Stock Plan              For       For          Management
3     Ratify KPMG LLP as Auditors             For       For          Management
4     Advisory Vote to Ratify Named           For       For          Management
      Executive Officers' Compensation
5     Report on Gender Pay Gap                Against   For          Shareholder


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AGCO CORP.

Ticker:       AGCO           Security ID:  001084102
Meeting Date: APR 25, 2019   Meeting Type: Annual
Record Date:  MAR 15, 2019

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1.1   Elect Director Roy V. Armes             For       For          Management
1.2   Elect Director Michael C. Arnold        For       For          Management
1.3   Elect Director P. George Benson         For       For          Management
1.4   Elect Director Suzanne P. Clark         For       For          Management
1.5   Elect Director Wolfgang Deml            For       For          Management
1.6   Elect Director George E. Minnich        For       For          Management
1.7   Elect Director Martin H. Richenhagen    For       For          Management
1.8   Elect Director Gerald L. Shaheen        For       For          Management
1.9   Elect Director Mallika Srinivasan       For       For          Management
1.10  Elect Director Hendrikus Visser         For       For          Management
2     Advisory Vote to Ratify Named           For       Against      Management
      Executive Officers' Compensation
3     Ratify KPMG LLP as Auditor              For       For          Management


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AMAZON.COM, INC.

Ticker:       AMZN           Security ID:  023135106
Meeting Date: MAY 22, 2019   Meeting Type: Annual
Record Date:  MAR 28, 2019

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1a    Elect Director Jeffrey P. Bezos         For       For          Management
1b    Elect Director Rosalind G. Brewer       For       For          Management
1c    Elect Director Jamie S. Gorelick        For       For          Management
1d    Elect Director Daniel P. Huttenlocher   For       For          Management
1e    Elect Director Judith A. McGrath        For       For          Management
1f    Elect Director Indra K. Nooyi           For       For          Management
1g    Elect Director Jonathan J. Rubinstein   For       For          Management
1h    Elect Director Thomas O. Ryder          For       For          Management
1i    Elect Director Patricia Q. Stonesifer   For       For          Management
1j    Elect Director Wendell P. Weeks         For       Against      Management
2     Ratify Ernst & Young LLP as Auditor     For       For          Management
3     Advisory Vote to Ratify Named           For       For          Management
      Executive Officers' Compensation
4     Report on Management of Food Waste      Against   For          Shareholder
5     Reduce Ownership Threshold for          Against   For          Shareholder
      Shareholders to Call Special Meeting
6     Prohibit Sales of Facial Recognition    Against   Against      Shareholder
      Technology to Government Agencies
7     Report on Impact of Government Use of   Against   For          Shareholder
      Facial Recognition Technologies
8     Report on Products Promoting Hate       Against   For          Shareholder
      Speech
9     Require Independent Board Chairman      Against   For          Shareholder
10    Report on Sexual Harassment             Against   For          Shareholder
11    Report on Climate Change                Against   For          Shareholder
12    Disclose a Board of Directors'          Against   Against      Shareholder
      Qualification Matrix
13    Report on Gender Pay Gap                Against   For          Shareholder
14    Assess Feasibility of Including         Against   For          Shareholder
      Sustainability as a Performance
      Measure for Senior Executive
      Compensation
15    Provide Vote Counting to Exclude        Against   Against      Shareholder
      Abstentions


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BANK OF AMERICA CORPORATION

Ticker:       BAC            Security ID:  060505104
Meeting Date: APR 24, 2019   Meeting Type: Annual
Record Date:  MAR 04, 2019

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1a    Elect Director Sharon L. Allen          For       For          Management
1b    Elect Director Susan S. Bies            For       For          Management
1c    Elect Director Jack O. Bovender, Jr.    For       For          Management
1d    Elect Director Frank P. Bramble, Sr.    For       For          Management
1e    Elect Director Pierre J.P. de Weck      For       For          Management
1f    Elect Director Arnold W. Donald         For       For          Management
1g    Elect Director Linda P. Hudson          For       For          Management
1h    Elect Director Monica C. Lozano         For       For          Management
1i    Elect Director Thomas J. May            For       For          Management
1j    Elect Director Brian T. Moynihan        For       For          Management
1k    Elect Director Lionel L. Nowell, III    For       For          Management
1l    Elect Director Clayton S. Rose          For       For          Management
1m    Elect Director Michael D. White         For       For          Management
1n    Elect Director Thomas D. Woods          For       For          Management
1o    Elect Director R. David Yost            For       For          Management
1p    Elect Director Maria T. Zuber           For       For          Management
2     Advisory Vote to Ratify Named           For       For          Management
      Executive Officers' Compensation
3     Ratify PricewaterhouseCoopers LLP as    For       For          Management
      Auditors
4     Amend Omnibus Stock Plan                For       For          Management
5     Report on Gender Pay Gap                Against   For          Shareholder
6     Provide Right to Act by Written Consent Against   For          Shareholder
7     Amend Proxy Access Right                Against   Against      Shareholder


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BIOGEN INC.

Ticker:       BIIB           Security ID:  09062X103
Meeting Date: JUN 19, 2019   Meeting Type: Annual
Record Date:  APR 22, 2019

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1a    Elect Director John R. Chiminski        None      None         Management
      *Withdrawn Resolution*
1b    Elect Director Alexander J. Denner      For       For          Management
1c    Elect Director Caroline D. Dorsa        For       For          Management
1d    Elect Director William A. Hawkins       For       For          Management
1e    Elect Director Nancy L. Leaming         For       For          Management
1f    Elect Director Jesus B. Mantas          For       For          Management
1g    Elect Director Richard C. Mulligan      For       For          Management
1h    Elect Director Robert W. Pangia         For       For          Management
1i    Elect Director Stelios Papadopoulos     For       For          Management
1j    Elect Director Brian S. Posner          For       For          Management
1k    Elect Director Eric K. Rowinsky         For       For          Management
1l    Elect Director Lynn Schenk              For       For          Management
1m    Elect Director Stephen A. Sherwin       For       For          Management
1n    Elect Director Michel Vounatsos         For       For          Management
2     Ratify PricewaterhouseCoopers LLP as    For       For          Management
      Auditors
3     Advisory Vote to Ratify Named           For       For          Management
      Executive Officers' Compensation


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BOOKING HOLDINGS INC.

Ticker:       BKNG           Security ID:  09857L108
Meeting Date: JUN 06, 2019   Meeting Type: Annual
Record Date:  APR 11, 2019

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1.1   Elect Director Timothy M. Armstrong     For       For          Management
1.2   Elect Director Jeffery H. Boyd          For       For          Management
1.3   Elect Director Glenn D. Fogel           For       For          Management
1.4   Elect Director Mirian Graddick-Weir     For       For          Management
1.5   Elect Director James M. Guyette         For       For          Management
1.6   Elect Director Wei Hopeman              For       For          Management
1.7   Elect Director Robert J. Mylod, Jr.     For       For          Management
1.8   Elect Director Charles H. Noski         For       For          Management
1.9   Elect Director Nancy B. Peretsman       For       For          Management
1.10  Elect Director Nicholas J. Read         For       For          Management
1.11  Elect Director Thomas E. Rothman        For       For          Management
1.12  Elect Director Lynn M. Vojvodich        For       For          Management
1.13  Elect Director Vanessa A. Wittman       For       For          Management
2     Ratify Deloitte & Touche LLP as         For       For          Management
      Auditors
3     Advisory Vote to Ratify Named           For       For          Management
      Executive Officers' Compensation
4     Amend Proxy Access Bylaw                Against   Against      Shareholder


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BRUNSWICK CORP.

Ticker:       BC             Security ID:  117043109
Meeting Date: MAY 08, 2019   Meeting Type: Annual
Record Date:  MAR 11, 2019

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1a    Elect Director David C. Everitt         For       For          Management
1b    Elect Director Lauren Patricia Flaherty For       For          Management
1c    Elect Director Joseph W. McClanathan    For       For          Management
1d    Elect Director Roger J. Wood            For       For          Management
2     Advisory Vote to Ratify Named           For       For          Management
      Executive Officers' Compensation
3     Ratify Deloitte & Touche LLP as Auditor For       For          Management


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CF INDUSTRIES HOLDINGS, INC.

Ticker:       CF             Security ID:  125269100
Meeting Date: MAY 08, 2019   Meeting Type: Annual
Record Date:  MAR 15, 2019

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1a    Elect Director Javed Ahmed              For       For          Management
1b    Elect Director Robert C. Arzbaecher     For       For          Management
1c    Elect Director William Davisson         For       For          Management
1d    Elect Director John W. Eaves            For       For          Management
1e    Elect Director Stephen A. Furbacher     For       For          Management
1f    Elect Director Stephen J. Hagge         For       For          Management
1g    Elect Director John D. Johnson          For       For          Management
1h    Elect Director Anne P. Noonan           For       For          Management
1i    Elect Director Michael J. Toelle        For       For          Management
1j    Elect Director Theresa E. Wagler        For       For          Management
1k    Elect Director Celso L. White           For       For          Management
1l    Elect Director W. Anthony Will          For       For          Management
2     Advisory Vote to Ratify Named           For       For          Management
      Executive Officers' Compensation
3     Ratify KPMG LLP as Auditors             For       For          Management
4     Provide Right to Act by Written Consent Against   For          Shareholder


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CIGNA CORPORATION

Ticker:       CI             Security ID:  125523100
Meeting Date: APR 24, 2019   Meeting Type: Annual
Record Date:  FEB 25, 2019

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1.1   Elect Director David M. Cordani         For       For          Management
1.2   Elect Director William J. DeLaney       For       For          Management
1.3   Elect Director Eric J. Foss             For       For          Management
1.4   Elect Director Elder Granger            For       For          Management
1.5   Elect Director Isaiah Harris, Jr.       For       For          Management
1.6   Elect Director Roman Martinez, IV       For       For          Management
1.7   Elect Director Kathleen M. Mazzarella   For       For          Management
1.8   Elect Director Mark B. McClellan        For       For          Management
1.9   Elect Director John M. Partridge        For       For          Management
1.10  Elect Director William L. Roper         For       For          Management
1.11  Elect Director Eric C. Wiseman          For       For          Management
1.12  Elect Director Donna F. Zarcone         For       For          Management
1.13  Elect Director William D. Zollars       For       For          Management
2     Advisory Vote to Ratify Named           For       For          Management
      Executive Officers' Compensation
3     Ratify PricewaterhouseCoopers LLP as    For       For          Management
      Auditors
4     Provide Right to Act by Written Consent Against   For          Shareholder
5     Report on Cyber Risk *Withdrawn         None      None         Shareholder
      Resolution*
6     Report on Gender Pay Gap                Against   For          Shareholder


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DXC TECHNOLOGY COMPANY

Ticker:       DXC            Security ID:  23355L106
Meeting Date: AUG 15, 2018   Meeting Type: Annual
Record Date:  JUN 18, 2018

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1a    Elect Director Mukesh Aghi              For       For          Management
1b    Elect Director Amy E. Alving            For       For          Management
1c    Elect Director David L. Herzog          For       For          Management
1d    Elect Director Sachin Lawande           For       For          Management
1e    Elect Director J. Michael Lawrie        For       For          Management
1f    Elect Director Mary L. Krakauer         For       For          Management
1g    Elect Director Julio A. Portalatin      For       For          Management
1h    Elect Director Peter Rutland            For       For          Management
1i    Elect Director Manoj P. Singh           For       For          Management
1j    Elect Director Robert F. Woods          For       For          Management
2     Ratify Deloitte & Touche LLP as         For       For          Management
      Auditors
3     Advisory Vote to Ratify Named           For       For          Management
      Executive Officers' Compensation


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EATON CORPORATION PLC

Ticker:       ETN            Security ID:  G29183103
Meeting Date: APR 24, 2019   Meeting Type: Annual
Record Date:  FEB 25, 2019

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1a    Elect Director Craig Arnold             For       For          Management
1b    Elect Director Todd M. Bluedorn         For       Against      Management
1c    Elect Director Christopher M. Connor    For       For          Management
1d    Elect Director Michael J. Critelli      For       For          Management
1e    Elect Director Richard H. Fearon        For       For          Management
1f    Elect Director Arthur E. Johnson        For       For          Management
1g    Elect Director Olivier Leonetti         For       For          Management
1h    Elect Director Deborah L. McCoy         For       For          Management
1i    Elect Director Gregory R. Page          For       For          Management
1j    Elect Director Sandra Pianalto          For       For          Management
1k    Elect Director Gerald B. Smith          For       For          Management
1l    Elect Director Dorothy C. Thompson      For       For          Management
2     Approve Ernst & Young LLP as Auditor    For       For          Management
      and Authorize Board to Fix Their
      Remuneration
3     Advisory Vote to Ratify Named           For       For          Management
      Executive Officers' Compensation
4     Authorize Issue of Equity with          For       For          Management
      Pre-emptive Rights
5     Authorize Issue of Equity without       For       For          Management
      Pre-emptive Rights
6     Authorize Share Repurchase of Issued    For       For          Management
      Share Capital


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EPR PROPERTIES

Ticker:       EPR            Security ID:  26884U109
Meeting Date: MAY 30, 2019   Meeting Type: Annual
Record Date:  MAR 08, 2019

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1.1   Elect Director Barrett Brady            For       Withhold     Management
1.2   Elect Director Peter C. Brown           For       For          Management
1.3   Elect Director James B. Connor          For       For          Management
2     Advisory Vote to Ratify Named           For       For          Management
      Executive Officers' Compensation
3     Ratify KPMG LLP as Auditors             For       For          Management


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EXELON CORPORATION

Ticker:       EXC            Security ID:  30161N101
Meeting Date: APR 30, 2019   Meeting Type: Annual
Record Date:  MAR 04, 2019

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1a    Elect Director Anthony K. Anderson      For       For          Management
1b    Elect Director Ann C. Berzin            For       For          Management
1c    Elect Director Laurie Brlas             For       For          Management
1d    Elect Director Christopher M. Crane     For       For          Management
1e    Elect Director Yves C. de Balmann       For       For          Management
1f    Elect Director Nicholas DeBenedictis    For       For          Management
1g    Elect Director Linda P. Jojo            For       For          Management
1h    Elect Director Paul L. Joskow           For       For          Management
1i    Elect Director Robert J. Lawless        For       For          Management
1j    Elect Director Richard W. Mies          For       For          Management
1k    Elect Director Mayo A. Shattuck, III    For       For          Management
1l    Elect Director Stephen D. Steinour      For       Against      Management
1m    Elect Director John F. Young            For       For          Management
2     Ratify PricewaterhouseCoopers LLP as    For       For          Management
      Auditor
3     Advisory Vote to Ratify Named           For       For          Management
      Executive Officers' Compensation
4     Report on Costs and Benefits of         Against   Against      Shareholder
      Environment-related Activities


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EXTRA SPACE STORAGE INC.

Ticker:       EXR            Security ID:  30225T102
Meeting Date: MAY 22, 2019   Meeting Type: Annual
Record Date:  MAR 25, 2019

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1.1   Elect Director Kenneth M. Woolley       For       For          Management
1.2   Elect Director Joseph D. Margolis       For       For          Management
1.3   Elect Director Roger B. Porter          For       For          Management
1.4   Elect Director Joseph J. Bonner         For       For          Management
1.5   Elect Director Ashley Dreier            For       For          Management
1.6   Elect Director Spencer F. Kirk          For       For          Management
1.7   Elect Director Dennis J. Letham         For       For          Management
1.8   Elect Director Diane Olmstead           For       For          Management
2     Ratify Ernst & Young LLP as Auditors    For       For          Management
3     Advisory Vote to Ratify Named           For       For          Management
      Executive Officers' Compensation


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FIDELITY NATIONAL INFORMATION SERVICES, INC.

Ticker:       FIS            Security ID:  31620M106
Meeting Date: MAY 22, 2019   Meeting Type: Annual
Record Date:  APR 01, 2019

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1a    Elect Director Ellen R. Alemany         For       For          Management
1b    Elect Director Keith W. Hughes          For       For          Management
1c    Elect Director David K. Hunt            For       For          Management
1d    Elect Director Stephan A. James         For       For          Management
1e    Elect Director Leslie M. Muma           For       For          Management
1f    Elect Director Alexander Navab          For       For          Management
1g    Elect Director Gary A. Norcross         For       For          Management
1h    Elect Director Louise M. Parent         For       For          Management
1i    Elect Director Brian T. Shea            For       For          Management
1j    Elect Director James B. Stallings, Jr.  For       For          Management
2     Advisory Vote to Ratify Named           For       For          Management
      Executive Officers' Compensation
3     Ratify KPMG LLP as Auditors             For       For          Management


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GENERAL MILLS, INC.

Ticker:       GIS            Security ID:  370334104
Meeting Date: SEP 25, 2018   Meeting Type: Annual
Record Date:  JUL 27, 2018

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1a    Elect Director Alicia Boler Davis       For       For          Management
1b    Elect Director R. Kerry Clark           For       For          Management
1c    Elect Director David M. Cordani         For       For          Management
1d    Elect Director Roger W. Ferguson, Jr.   For       For          Management
1e    Elect Director Jeffrey L. Harmening     For       For          Management
1f    Elect Director Maria G. Henry           For       For          Management
1g    Elect Director Heidi G. Miller          For       For          Management
1h    Elect Director Steve Odland             For       For          Management
1i    Elect Director Maria A. Sastre          For       For          Management
1j    Elect Director Eric D. Sprunk           For       For          Management
1k    Elect Director Jorge A. Uribe           For       For          Management
2     Advisory Vote to Ratify Named           For       For          Management
      Executive Officers' Compensation
3     Ratify KPMG LLP as Auditors             For       For          Management
4     Report on Impact of Pesticides on       Against   Against      Shareholder
      Pollinators


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GMS, INC.

Ticker:       GMS            Security ID:  36251C103
Meeting Date: OCT 30, 2018   Meeting Type: Annual
Record Date:  SEP 04, 2018

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1a    Elect Director John J. Gavin            For       Against      Management
1b    Elect Director Ronald R. Ross           For       Against      Management
1c    Elect Director J. David Smith           For       Against      Management
2     Ratify Ernst & Young LLP as Auditors    For       For          Management
3     Advisory Vote to Ratify Named           For       For          Management
      Executive Officers' Compensation


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HCA HEALTHCARE, INC.

Ticker:       HCA            Security ID:  40412C101
Meeting Date: APR 26, 2019   Meeting Type: Annual
Record Date:  MAR 07, 2019

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1a    Elect Director Thomas F. Frist, III     For       For          Management
1b    Elect Director Samuel N. Hazen          For       For          Management
1c    Elect Director Meg G. Crofton           For       For          Management
1d    Elect Director Robert J. Dennis         For       Against      Management
1e    Elect Director Nancy-Ann DeParle        For       For          Management
1f    Elect Director William R. Frist         For       For          Management
1g    Elect Director Charles O. Holliday, Jr. For       For          Management
1h    Elect Director Geoffrey G. Meyers       For       For          Management
1i    Elect Director Michael W. Michelson     For       For          Management
1j    Elect Director Wayne J. Riley           For       For          Management
1k    Elect Director John W. Rowe             For       For          Management
2     Ratify Ernst & Young LLP as Auditors    For       For          Management
3     Advisory Vote to Ratify Named           For       For          Management
      Executive Officers' Compensation
4     Eliminate Supermajority Vote            For       For          Management
      Requirement


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HUMANA INC.

Ticker:       HUM            Security ID:  444859102
Meeting Date: APR 18, 2019   Meeting Type: Annual
Record Date:  FEB 25, 2019

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1a    Elect Director Kurt J. Hilzinger        For       For          Management
1b    Elect Director Frank J. Bisignano       For       For          Management
1c    Elect Director Bruce D. Broussard       For       For          Management
1d    Elect Director Frank A. D'Amelio        For       For          Management
1e    Elect Director Karen B. DeSalvo         For       For          Management
1f    Elect Director W. Roy Dunbar            For       For          Management
1g    Elect Director David A. Jones, Jr.      For       For          Management
1h    Elect Director William J. McDonald      For       For          Management
1i    Elect Director James J. O'Brien         For       For          Management
1j    Elect Director Marissa T. Peterson      For       For          Management
2     Ratify PricewaterhouseCoopers LLP as    For       For          Management
      Auditors
3     Advisory Vote to Ratify Named           For       For          Management
      Executive Officers' Compensation
4     Approve Omnibus Stock Plan              For       For          Management


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INGREDION INCORPORATED

Ticker:       INGR           Security ID:  457187102
Meeting Date: MAY 15, 2019   Meeting Type: Annual
Record Date:  MAR 18, 2019

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1a    Elect Director Luis Aranguren-Trellez   For       For          Management
1b    Elect Director David B. Fischer         For       For          Management
1c    Elect Director Paul Hanrahan            For       For          Management
1d    Elect Director Rhonda L. Jordan         For       For          Management
1e    Elect Director Gregory B. Kenny         For       For          Management
1f    Elect Director Barbara A. Klein         For       For          Management
1g    Elect Director Victoria J. Reich        For       For          Management
1h    Elect Director Jorge A. Uribe           For       For          Management
1i    Elect Director Dwayne A. Wilson         For       For          Management
1j    Elect Director James P. Zallie          For       For          Management
2     Advisory Vote to Ratify Named           For       For          Management
      Executive Officers' Compensation
3     Ratify KPMG LLP as Auditors             For       For          Management


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LEAR CORPORATION

Ticker:       LEA            Security ID:  521865204
Meeting Date: MAY 16, 2019   Meeting Type: Annual
Record Date:  MAR 21, 2019

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1a    Elect Director Thomas P. Capo           For       For          Management
1b    Elect Director Mei-Wei Cheng            For       For          Management
1c    Elect Director Jonathan F. Foster       For       For          Management
1d    Elect Director Mary Lou Jepsen          For       For          Management
1e    Elect Director Kathleen A. Ligocki      For       For          Management
1f    Elect Director Conrad L. Mallett, Jr.   For       For          Management
1g    Elect Director Raymond E. Scott         For       For          Management
1h    Elect Director Gregory C. Smith         For       For          Management
1i    Elect Director Henry D.G. Wallace       For       For          Management
2     Ratify Ernst & Young LLP as Auditors    For       For          Management
3     Advisory Vote to Ratify Named           For       For          Management
      Executive Officers' Compensation
4     Approve Omnibus Stock Plan              For       For          Management


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LEIDOS HOLDINGS, INC.

Ticker:       LDOS           Security ID:  525327102
Meeting Date: APR 26, 2019   Meeting Type: Annual
Record Date:  FEB 25, 2019

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1a    Elect Director Gregory R. Dahlberg      For       For          Management
1b    Elect Director David G. Fubini          For       For          Management
1c    Elect Director Miriam E. John           For       For          Management
1d    Elect Director Frank Kendall, III       For       For          Management
1e    Elect Director Robert C. Kovarik, Jr.   For       For          Management
1f    Elect Director Harry M.J. Kraemer, Jr.  For       For          Management
1g    Elect Director Roger A. Krone           For       For          Management
1h    Elect Director Gary S. May              For       For          Management
1i    Elect Director Surya N. Mohapatra       For       For          Management
1j    Elect Director Lawrence C. Nussdorf     For       For          Management
1k    Elect Director Robert S. Shapard        For       For          Management
1l    Elect Director Susan M. Stalnecker      For       For          Management
1m    Elect Director Noel B. Williams         For       For          Management
2     Advisory Vote to Ratify Named           For       For          Management
      Executive Officers' Compensation
3     Adopt Simple Majority Vote              Against   For          Shareholder
4     Ratify Deloitte & Touche LLP as         For       For          Management
      Auditors


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MARATHON PETROLEUM CORP.

Ticker:       MPC            Security ID:  56585A102
Meeting Date: SEP 24, 2018   Meeting Type: Special
Record Date:  AUG 01, 2018

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1     Issue Shares in Connection with Merger  For       For          Management
2     Increase Authorized Common Stock        For       For          Management
3     Approve Increase in Size of Board       For       For          Management
4     Adjourn Meeting                         For       For          Management


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MARATHON PETROLEUM CORPORATION

Ticker:       MPC            Security ID:  56585A102
Meeting Date: APR 24, 2019   Meeting Type: Annual
Record Date:  FEB 25, 2019

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1a    Elect Director Evan Bayh                For       For          Management
1b    Elect Director Charles E. Bunch         For       For          Management
1c    Elect Director Edward G. Galante        For       For          Management
1d    Elect Director Kim K.W. Rucker          For       For          Management
2     Ratify PricewaterhouseCoopers LLP as    For       For          Management
      Auditors
3     Advisory Vote to Ratify Named           For       For          Management
      Executive Officers' Compensation
4     Provide Right to Act by Written Consent Against   For          Shareholder
5     Require Independent Board Chairman      Against   Against      Shareholder


--------------------------------------------------------------------------------

MCKESSON CORPORATION

Ticker:       MCK            Security ID:  58155Q103
Meeting Date: JUL 25, 2018   Meeting Type: Annual
Record Date:  MAY 31, 2018

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1a    Elect Director N. Anthony Coles         For       For          Management
1b    Elect Director John H. Hammergren       For       For          Management
1c    Elect Director M. Christine Jacobs      For       For          Management
1d    Elect Director Donald R. Knauss         For       For          Management
1e    Elect Director Marie L. Knowles         For       Against      Management
1f    Elect Director Bradley E. Lerman        For       For          Management
1g    Elect Director Edward A. Mueller        For       For          Management
1h    Elect Director Susan R. Salka           For       For          Management
2     Ratify Deloitte & Touche LLP as         For       For          Management
      Auditors
3     Advisory Vote to Ratify Named           For       For          Management
      Executive Officers' Compensation
4     Report on Lobbying Payments and Policy  Against   For          Shareholder
5     Pro-rata Vesting of Equity Awards       Against   Against      Shareholder
6     Use GAAP for Executive Compensation     Against   Against      Shareholder
      Metrics
7     Reduce Ownership Threshold for          Against   For          Shareholder
      Shareholders to Call Special Meeting


--------------------------------------------------------------------------------

MEDICAL PROPERTIES TRUST, INC.

Ticker:       MPW            Security ID:  58463J304
Meeting Date: MAY 23, 2019   Meeting Type: Annual
Record Date:  MAR 21, 2019

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1.1   Elect Director Edward K. Aldag, Jr.     For       For          Management
1.2   Elect Director G. Steven Dawson         For       For          Management
1.3   Elect Director R. Steven Hamner         For       For          Management
1.4   Elect Director Elizabeth N. Pitman      For       For          Management
1.5   Elect Director  C. Reynolds Thompson,   For       For          Management
      III
1.6   Elect Director D. Paul Sparks, Jr.      For       For          Management
1.7   Elect Director Michael G. Stewart       For       For          Management
2     Ratify PricewaterhouseCoopers LLP as    For       For          Management
      Auditors
3     Advisory Vote to Ratify Named           For       For          Management
      Executive Officers' Compensation
4     Approve Omnibus Stock Plan              For       For          Management


--------------------------------------------------------------------------------

MICROSOFT CORP.

Ticker:       MSFT           Security ID:  594918104
Meeting Date: NOV 28, 2018   Meeting Type: Annual
Record Date:  SEP 26, 2018

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1.1   Elect Director William H. Gates, III    For       For          Management
1.2   Elect Director Reid G. Hoffman          For       For          Management
1.3   Elect Director Hugh F. Johnston         For       For          Management
1.4   Elect Director Teri L. List-Stoll       For       For          Management
1.5   Elect Director Satya Nadella            For       For          Management
1.6   Elect Director Charles H. Noski         For       For          Management
1.7   Elect Director Helmut Panke             For       For          Management
1.8   Elect Director Sandra E. Peterson       For       For          Management
1.9   Elect Director Penny S. Pritzker        For       For          Management
1.10  Elect Director Charles W. Scharf        For       For          Management
1.11  Elect Director Arne M. Sorenson         For       For          Management
1.12  Elect Director John W. Stanton          For       For          Management
1.13  Elect Director John W. Thompson         For       For          Management
1.14  Elect Director Padmasree Warrior        For       For          Management
2     Advisory Vote to Ratify Named           For       For          Management
      Executive Officers' Compensation
3     Ratify Deloitte & Touche LLP as         For       For          Management
      Auditors


--------------------------------------------------------------------------------

MOLSON COORS BREWING COMPANY

Ticker:       TAP            Security ID:  60871R209
Meeting Date: MAY 22, 2019   Meeting Type: Annual
Record Date:  MAR 28, 2019

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1.1   Elect Director Roger G. Eaton           For       For          Management
1.2   Elect Director Charles M. Herington     For       For          Management
1.3   Elect Director H. Sanford Riley         For       Withhold     Management
2     Advisory Vote to Ratify Named           For       For          Management
      Executive Officers' Compensation


--------------------------------------------------------------------------------

MSC INDUSTRIAL DIRECT CO., INC.

Ticker:       MSM            Security ID:  553530106
Meeting Date: JAN 29, 2019   Meeting Type: Annual
Record Date:  DEC 11, 2018

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1.1   Elect Director Mitchell Jacobson        For       For          Management
1.2   Elect Director Erik Gershwind           For       For          Management
1.3   Elect Director Jonathan Byrnes          For       For          Management
1.4   Elect Director Roger Fradin             For       Withhold     Management
1.5   Elect Director Louise Goeser            For       For          Management
1.6   Elect Director Michael Kaufmann         For       For          Management
1.7   Elect Director Denis Kelly              For       For          Management
1.8   Elect Director Steven Paladino          For       For          Management
1.9   Elect Director Philip Peller            For       For          Management
2     Ratify Ernst & Young LLP as Auditors    For       For          Management
3     Advisory Vote to Ratify Named           For       For          Management
      Executive Officers' Compensation


--------------------------------------------------------------------------------

NEXTERA ENERGY PARTNERS LP

Ticker:       NEP            Security ID:  65341B106
Meeting Date: APR 22, 2019   Meeting Type: Annual
Record Date:  FEB 22, 2019

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1a    Elect Director Susan D. Austin          For       For          Management
1b    Elect Director Robert J. Byrne          For       For          Management
1c    Elect Director Peter H. Kind            For       For          Management
1d    Elect Director James L. Robo            For       Against      Management
2     Ratify Deloitte & Touche LLP as         For       For          Management
      Auditors
3     Advisory Vote to Ratify Named           For       For          Management
      Executive Officers' Compensation


--------------------------------------------------------------------------------

OKTA, INC.

Ticker:       OKTA           Security ID:  679295105
Meeting Date: JUN 13, 2019   Meeting Type: Annual
Record Date:  APR 18, 2019

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1.1   Elect Director J. Frederic Kerrest      For       Withhold     Management
1.2   Elect Director Rebecca Saeger           For       For          Management
1.3   Elect Director Michelle Wilson          For       Withhold     Management
2     Ratify Ernst & Young LLP as Auditor     For       For          Management
3     Advisory Vote to Ratify Named           For       For          Management
      Executive Officers' Compensation
4     Advisory Vote on Say on Pay Frequency   One Year  One Year     Management


--------------------------------------------------------------------------------

PHILIP MORRIS INTERNATIONAL INC.

Ticker:       PM             Security ID:  718172109
Meeting Date: MAY 01, 2019   Meeting Type: Annual
Record Date:  MAR 08, 2019

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1.1   Elect Director Andre Calantzopoulos     For       For          Management
1.2   Elect Director Louis C. Camilleri       For       Against      Management
1.3   Elect Director Massimo Ferragamo        For       For          Management
1.4   Elect Director Werner Geissler          For       For          Management
1.5   Elect Director Lisa A. Hook             For       For          Management
1.6   Elect Director Jennifer Li              For       For          Management
1.7   Elect Director Jun Makihara             For       For          Management
1.8   Elect Director Kalpana Morparia         For       For          Management
1.9   Elect Director Lucio A. Noto            For       For          Management
1.10  Elect Director Frederik Paulsen         For       For          Management
1.11  Elect Director Robert B. Polet          For       For          Management
1.12  Elect Director Stephen M. Wolf          For       For          Management
2     Advisory Vote to Ratify Named           For       For          Management
      Executive Officers' Compensation
3     Ratify PricewaterhouseCoopers SA as     For       For          Management
      Auditor


--------------------------------------------------------------------------------

PHILLIPS 66

Ticker:       PSX            Security ID:  718546104
Meeting Date: MAY 08, 2019   Meeting Type: Annual
Record Date:  MAR 11, 2019

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1a    Elect Director Greg C. Garland          For       For          Management
1b    Elect Director Gary K. Adams            For       For          Management
1c    Elect Director John E. Lowe             For       For          Management
1d    Elect Director Denise L. Ramos          For       For          Management
2     Ratify Ernst & Young LLP as Auditors    For       For          Management
3     Advisory Vote to Ratify Named           For       For          Management
      Executive Officers' Compensation
4     Advisory Vote on Say on Pay Frequency   One Year  One Year     Management
5     Report on Plastic Pollution *Withdrawn  None      None         Shareholder
      Resolution*


--------------------------------------------------------------------------------

PLANET FITNESS, INC.

Ticker:       PLNT           Security ID:  72703H101
Meeting Date: APR 29, 2019   Meeting Type: Annual
Record Date:  MAR 08, 2019

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1.1   Elect Director Craig Benson             For       Withhold     Management
1.2   Elect Director Cambria Dunaway          For       Withhold     Management
2     Ratify KPMG LLP as Auditors             For       For          Management
3     Advisory Vote to Ratify Named           For       For          Management
      Executive Officers' Compensation


--------------------------------------------------------------------------------

REGAL BELOIT CORP.

Ticker:       RBC            Security ID:  758750103
Meeting Date: APR 30, 2019   Meeting Type: Annual
Record Date:  MAR 07, 2019

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1a    Elect Director Stephen M. Burt          For       For          Management
1b    Elect Director Anesa T. Chaibi          For       For          Management
1c    Elect Director Christopher L. Doerr     For       For          Management
1d    Elect Director Thomas J. Fischer        For       For          Management
1e    Elect Director Dean A. Foate            For       For          Management
1f    Elect Director Rakesh Sachdev           For       For          Management
1g    Elect Director Curtis W. Stoelting      For       For          Management
1h    Elect Director Jane L. Warner           For       For          Management
2     Advisory Vote to Ratify Named           For       For          Management
      Executive Officers' Compensation
3     Ratify Deloitte & Touche LLP as Auditor For       For          Management


--------------------------------------------------------------------------------

STARBUCKS CORP.

Ticker:       SBUX           Security ID:  855244109
Meeting Date: MAR 20, 2019   Meeting Type: Annual
Record Date:  JAN 10, 2019

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1a    Elect Director Rosalind G. Brewer       For       For          Management
1b    Elect Director Mary N. Dillon           For       Against      Management
1c    Elect Director Mellody Hobson           For       For          Management
1d    Elect Director Kevin R. Johnson         For       For          Management
1e    Elect Director Jorgen Vig Knudstorp     For       For          Management
1f    Elect Director Satya Nadella            For       For          Management
1g    Elect Director Joshua Cooper Ramo       For       For          Management
1h    Elect Director Clara Shih               For       For          Management
1i    Elect Director Javier G. Teruel         For       For          Management
1j    Elect Director Myron E. Ullman, III     For       For          Management
2     Advisory Vote to Ratify Named           For       For          Management
      Executive Officers' Compensation
3     Ratify Deloitte & Touche LLP as         For       For          Management
      Auditors
4     Adopt a Policy on Board Diversity       Against   Against      Shareholder
5     Report on Sustainable Packaging         Against   For          Shareholder


--------------------------------------------------------------------------------

STORE CAPITAL CORPORATION

Ticker:       STOR           Security ID:  862121100
Meeting Date: MAY 30, 2019   Meeting Type: Annual
Record Date:  APR 01, 2019

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1.1   Elect Director Joseph M. Donovan        For       For          Management
1.2   Elect Director Mary Fedewa              For       For          Management
1.3   Elect Director Morton H. Fleischer      For       For          Management
1.4   Elect Director William F. Hipp          For       For          Management
1.5   Elect Director Catherine D. Rice        For       For          Management
1.6   Elect Director Einar A. Seadler         For       For          Management
1.7   Elect Director Rajath Shourie           For       For          Management
1.8   Elect Director Quentin P. Smith, Jr.    For       For          Management
1.9   Elect Director Christopher H. Volk      For       For          Management
2     Amend Bylaws to Permit Shareholders to  For       For          Management
      Amend Bylaws
3     Advisory Vote to Ratify Named           For       For          Management
      Executive Officers' Compensation
4     Ratify Ernst & Young LLP as Auditors    For       For          Management


--------------------------------------------------------------------------------

TECH DATA CORPORATION

Ticker:       TECD           Security ID:  878237106
Meeting Date: JUN 05, 2019   Meeting Type: Annual
Record Date:  MAR 28, 2019

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1a    Elect Director Charles E. Adair         For       For          Management
1b    Elect Director Karen M. Dahut           For       For          Management
1c    Elect Director Robert M. Dutkowsky      For       For          Management
1d    Elect Director Harry J. Harczak, Jr.    For       For          Management
1e    Elect Director Bridgette P. Heller      For       For          Management
1f    Elect Director Richard T. Hume          For       For          Management
1g    Elect Director Kathleen Misunas         For       For          Management
1h    Elect Director Thomas I. Morgan         For       For          Management
1i    Elect Director Patrick G. Sayer         For       For          Management
1j    Elect Director Savio W. Tung            For       For          Management
2     Ratify Ernst & Young LLP as Auditors    For       For          Management
3     Advisory Vote to Ratify Named           For       For          Management
      Executive Officers' Compensation


--------------------------------------------------------------------------------

THE BOEING COMPANY

Ticker:       BA             Security ID:  097023105
Meeting Date: APR 29, 2019   Meeting Type: Annual
Record Date:  FEB 28, 2019

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1a    Elect Director Robert A. Bradway        For       For          Management
1b    Elect Director David L. Calhoun         For       For          Management
1c    Elect Director Arthur D. Collins, Jr.   For       For          Management
1d    Elect Director Edmund P. Giambastiani,  For       For          Management
      Jr.
1e    Elect Director Lynn J. Good             For       For          Management
1f    Elect Director Nikki R. Haley           For       For          Management
1g    Elect Director Lawrence W. Kellner      For       For          Management
1h    Elect Director Caroline B. Kennedy      For       For          Management
1i    Elect Director Edward M. Liddy          For       For          Management
1j    Elect Director Dennis A. Muilenburg     For       For          Management
1k    Elect Director Susan C. Schwab          For       For          Management
1l    Elect Director Ronald A. Williams       For       For          Management
1m    Elect Director Mike S. Zafirovski       For       For          Management
2     Advisory Vote to Ratify Named           For       For          Management
      Executive Officers' Compensation
3     Ratify Deloitte & Touche LLP as         For       For          Management
      Auditors
4     Report on Lobbying Payments and Policy  Against   For          Shareholder
5     Adjust Executive Compensation Metrics   Against   Against      Shareholder
      for Share Buybacks
6     Require Independent Board Chairman      Against   For          Shareholder
7     Amend Proxy Access Right                Against   Against      Shareholder
8     Adopt Share Retention Policy For        Against   Against      Shareholder
      Senior Executives


--------------------------------------------------------------------------------

TOLL BROTHERS, INC.

Ticker:       TOL            Security ID:  889478103
Meeting Date: MAR 12, 2019   Meeting Type: Annual
Record Date:  JAN 16, 2019

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1.1   Elect Director Robert I. Toll           For       For          Management
1.2   Elect Director Douglas C. Yearley, Jr.  For       For          Management
1.3   Elect Director Edward G. Boehne         For       For          Management
1.4   Elect Director Richard J. Braemer       For       For          Management
1.5   Elect Director Christine N. Garvey      For       For          Management
1.6   Elect Director Karen H. Grimes          For       For          Management
1.7   Elect Director Carl B. Marbach          For       For          Management
1.8   Elect Director John A. McLean           For       For          Management
1.9   Elect Director Stephen A. Novick        For       For          Management
1.10  Elect Director Wendell E. Pritchett     For       For          Management
1.11  Elect Director Paul E. Shapiro          For       For          Management
2     Ratify Ernst & Young LLP as Auditors    For       For          Management
3     Advisory Vote to Ratify Named           For       For          Management
      Executive Officers' Compensation
4     Approve Omnibus Stock Plan              For       For          Management


--------------------------------------------------------------------------------

US FOODS HOLDING CORP.

Ticker:       USFD           Security ID:  912008109
Meeting Date: MAY 01, 2019   Meeting Type: Annual
Record Date:  MAR 04, 2019

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1a    Elect Director Robert M. Dutkowsky      For       For          Management
1b    Elect Director Sunil Gupta              For       For          Management
1c    Elect Director Pietro Satriano          For       For          Management
2     Advisory Vote to Ratify Named           For       For          Management
      Executive Officers' Compensation
3     Approve Omnibus Stock Plan              For       For          Management
4     Amend Certificate of Incorporation to   For       For          Management
      Declassify the Board
5     Ratify Deloitte & Touche LLP as Auditor For       For          Management




============================ MFS Lifetime 2020 Fund ============================

There is no proxy voting activity for the fund, as the fund did not hold any
votable positions during the reporting period.



============================ MFS Lifetime 2025 Fund ============================

There is no proxy voting activity for the fund, as the fund did not hold any
votable positions during the reporting period.



============================ MFS Lifetime 2030 Fund ============================

There is no proxy voting activity for the fund, as the fund did not hold any
votable positions during the reporting period.



============================ MFS Lifetime 2035 Fund ============================

There is no proxy voting activity for the fund, as the fund did not hold any
votable positions during the reporting period.



============================ MFS Lifetime 2040 Fund ============================

There is no proxy voting activity for the fund, as the fund did not hold any
votable positions during the reporting period.



============================ MFS Lifetime 2045 Fund ============================

There is no proxy voting activity for the fund, as the fund did not hold any
votable positions during the reporting period.



============================ MFS Lifetime 2050 Fund ============================

There is no proxy voting activity for the fund, as the fund did not hold any
votable positions during the reporting period.



============================ MFS Lifetime 2055 Fund ============================

There is no proxy voting activity for the fund, as the fund did not hold any
votable positions during the reporting period.



============================ MFS Lifetime 2060 Fund ============================

There is no proxy voting activity for the fund, as the fund did not hold any
votable positions during the reporting period.



=========================== MFS Lifetime Income Fund ===========================

There is no proxy voting activity for the fund, as the fund did not hold any
votable positions during the reporting period.
========== END NPX REPORT



                                  SIGNATURES

Pursuant to the requirements of the Investment Company Act of 1940, the
registrant has duly caused this report to be signed on its behalf by the
undersigned, thereunto duly authorized.

Registrant: MFS SERIES TRUST XII

By (Signature and Title):  David DiLorenzo*
                           ---------------------------------------------------
                           David DiLorenzo, President and Principal
                           Executive Officer

Date: August 28, 2019

*By (Signature and Title)  /s/ Susan A. Pereira
                           ---------------------------------------------------
                           Susan A. Pereira, as attorney-in-fact

*  Executed by Susan A. Pereira on behalf of David DiLorenzo pursuant to a
   Power of Attorney dated June 1, 2017. (1)

(1)Incorporated by reference to MFS Series Trust XIII (File Nos. 2-74959 and
   811-03327) Post-Effective Amendment No. 65 filed with the SEC via EDGAR on
   June 27, 2017 (accession number 0001104659-17-041693).